Dual-source intake air-conditioning systems

ABSTRACT

Methods and systems for drawing air from different sources into an air-conditioner or an air-conditioning (AC) system based on control logic and to use condensate water formed on an evaporator to improve the heat rejection of a condenser coil, thereby improving energy efficiency, are described. Some implementations may include a configurable internal ducting system configured to draw air from at least one of an indoor source or an outdoor source. In some implementations, the air-conditioning system may include a control logic to determine whether the air is to be drawn from the indoor source or the outdoor source.In some implementations, the air-conditioning system may include an evaporator condensate reservoir to store condensate water collected from one or more evaporator coils of the air-conditioning system and an evaporator condensate pump to spray the stored condensate water on one or more condenser coils of the air-conditioning system.

RELATED APPLICATIONS

This application claims the benefit of U.S. Application No. 63/251,683,entitled “Dual-Source Intake Air-Conditioning Systems,” and filed onOct. 3, 2021, which is incorporated herein by reference in its entirety.

FIELD

The present disclosure is directed generally to air conditioningsystems, and, more particularly, to a dual-source air intakeair-conditioner including methods and systems for drawing air fromdifferent sources into an air-conditioner or air-conditioning (AC)system based on a control logic.

BACKGROUND

Traditional self-contained air-conditioning (AC) units draw air forcooling solely from indoor (recirculating) air. During peak daytimehours, as shown in Area I of FIG. 1 , this is the most energy-efficientstrategy as outdoor air would have increased to a temperature higherthan that of indoor air. However, buildings retain heat and indoortemperature may be higher than outdoor temperature after daytime hours.There are also cooler days when outside air temperature is cooler thanindoor air. Area II of FIG. 1 is an example of a zone where outdoortemperature is lower than indoor temperature. In this case, drawingoutdoor air for use as intake air for the unit and venting hot indoorair simultaneously would reduce the energy required to cool the indoorspace. However, self-contained AC units currently do not do this.

Also, due to the air-cooling process of an air-conditioner, the dewpoint of air passing through an evaporator coil drops, thereby losingits ability to retain humidity, which results in water condensate on theevaporator coil. Traditional self-contained AC units eject thiscondensate water, directing such water away from the AC unit to theoutside.

There exists therefore a need for an air-conditioner or an AC unit whichcollects condensate water from an evaporator coil and stores it in areservoir, and then pumps, under pressure, the stored water to a spraynozzle located at a condenser coil to increase heat rejection and reducethe energy consumption of the air-conditioner or the AC unit.

Some implementations of the present disclosure were conceived in lightof the above-mentioned problems and limitations of air-conditioners orAC units or self-contained AC units or air-conditioners with respect to,for example, access to more than one source of air for intake or accessto a system for storing condensate water from an evaporator coil andspraying that water on a condensate coil to increase heat rejection andreduce energy use.

SUMMARY

In some implementations, a self-contained air-conditioning unit may drawair from either an indoor source or an outdoor source based on thetemperature of air drawn from the respective source at a given point oftime. Such air-conditioning units may also collect and utilizecondensate water to improve the air-conditioning unit's condenser heatrejection and energy efficiency.

Some implementations may include an air-conditioning system comprising aconfigurable internal ducting system, wherein the configurable internalducting system may be configured to draw air from at least one of anindoor source or an outdoor source. In some implementations, theair-conditioning system may include a control logic to determine whetherthe air is to be drawn from the indoor source or the outdoor source.

In some implementations, the control logic may be configured to reduceenergy consumption of the air-conditioning system.

In some implementations, the control logic may cause the air to be drawnfrom the indoor source when indoor air from the indoor source is coolerthan outdoor air from the outdoor source. In some implementations, thecontrol logic may cause the air to be drawn from the outdoor source whenoutdoor air from the outdoor source is cooler than indoor air from theindoor source.

Some implementations may include an evaporator, wherein the air may bedrawn from at least one of the indoor source or the outdoor sourcethrough the evaporator. Some implementations may include an interiorintake fan, wherein the air from the indoor source may be recirculatedthrough the interior intake fan. Some implementations may include aninterior intake fan, wherein the air from the indoor source may bevented out through the interior intake fan. Some implementations mayinclude an exterior intake fan, wherein the air from the outdoor sourcemay be circulated through the exterior intake fan.

In some implementations, the control logic may determine whether theevaporator condensate reservoir is full. In some implementations, thecontrol logic may determine a time during which the evaporatorcondensate pump should be in operation. In some implementations, thecontrol logic may determine a duration for which the evaporatorcondensate pump should be in operation. In some implementations, thecontrol logic may determine whether a temperature of the air from theoutdoor source is below a predetermined threshold.

Some implementations may include an air-conditioning system comprisingan evaporator condensate reservoir to store condensate water collectedfrom one or more evaporator coils of the air-conditioning system. Insome implementations, the air-conditioning system may include anevaporator condensate pump to spray the stored condensate water on oneor more condenser coils of the air-conditioning system.

Some implementations can include a configurable internal ducting system,wherein the configurable internal ducting system may be configured todraw air from at least one of an indoor source or an outdoor source.Some implementations may include an evaporator, wherein the air may bedrawn from at least one of the indoor source or the outdoor sourcethrough the evaporator. Some implementations may include an interiorintake fan, wherein the air from the indoor source may be recirculatedthrough the interior intake fan. Some implementations may include aninterior intake fan, wherein the air from the indoor source may bevented out through the interior intake fan. Some implementations mayinclude an exterior intake fan, wherein the air from the outdoor sourcemay be circulated through the exterior intake fan. In someimplementations, the air-conditioning system may include a control logicto determine based on a selection of a user whether the air is to bedrawn from the indoor source or the outdoor source.

In some implementations, the control logic may cause the air to be drawnfrom the indoor source when indoor air from the indoor source is coolerthan outdoor air from the outdoor source. In some implementations, thecontrol logic may cause the air to be drawn from the outdoor source whenoutdoor air from the outdoor source is cooler than indoor air from theindoor source.

Some implementations may include an air-conditioning system comprising aconfigurable internal ducting system, wherein the configurable internalducting system may be configured to draw air from at least one of anindoor source or an outdoor source. In some implementations, theair-conditioning system may include an evaporator condensate reservoirto store condensate water collected from one or more evaporator coils ofthe air-conditioning system. In some implementations, theair-conditioning system may include an evaporator condensate pump tospray the stored condensate water on one or more condenser coils of theair-conditioning system. In some implementations, the air-conditioningsystem may include a control logic to determine based on a selection ofa user whether the air is to be drawn from the indoor source or theoutdoor source.

Embodiments were conceived in light of the above-mentioned problems andlimitations, among other things. The foregoing general description ofthe illustrative embodiments and the following detailed descriptionthereof are merely exemplary aspects of the teachings of this disclosureand are not restrictive. The background description provided herein isfor the purpose of generally presenting the context of this disclosure.Work of the presently named inventor(s), to the extent it is describedin this background section, as well as aspects of the description thatmay not otherwise qualify as prior art at the time of filing, areneither expressly nor impliedly admitted as prior art against thepresent disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, like reference numerals designate identical orcorresponding parts throughout the several views. Further, as usedherein, the words “a,” “an,” and the like generally carry a meaning of“one or more,” unless stated otherwise. The drawings are generally notdrawn to scale unless specified otherwise or illustrating schematicstructures or flowcharts. A more complete appreciation of thisdisclosure and many of the attendant advantages thereof will be readilyobtained as the same becomes better understood by reference to thefollowing detailed description when considered in connection with theaccompanying drawings, wherein:

FIG. 1 shows an example graph of outdoor and indoor air temperaturecycles of an example day in an example location in accordance with someimplementations;

FIG. 2 shows a diagram of an exemplary air-conditioning system inaccordance with some implementations;

FIG. 3 shows a diagram of an exemplary evaporator condensate watercollection, pumping, and spraying system in accordance with someimplementations;

FIG. 4 shows an example graph for determining spray timing logic inaccordance with some implementations;

FIG. 5 shows an example block diagram for intake air source ductingcontrol logic in accordance with some implementations;

FIG. 6 shows an example configuration for Mode 1 in accordance with someimplementations;

FIG. 7 shows an example configuration for Mode 2 in accordance with someimplementations;

FIG. 8 shows an example block diagram for spray control logic inaccordance with some implementations;

FIG. 9 shows an example configuration having a single motor and a singlemoveable airflow control plate in accordance with some implementations;and

FIGS. 10A and 10B show details of Mode 1 and Mode 2 settings of thesingle moveable plate in accordance with some implementations.

DETAILED DESCRIPTION

To introduce energy savings, an air-conditioning system (or heat pump orother compression cycle-based HVAC or other apparatus) may include aducting system that is configured to draw air from either an indoor oran outdoor source. Such air may be drawn through an evaporator coil. Thedecision on whether to draw the air from the indoor source or theoutdoor source may be based on the respective temperatures of the indoorand the outdoor air. The temperatures may be measured using sensors.Valves may be used to switch positions in order to draw the air from themost appropriate energy-efficient source.

During the air-cooling process of an air-conditioning system, the dewpoint of air passing through an evaporator coil drops and the air losesits humidity, thereby resulting in condensate water forming on the coil.Traditional self-contained air-conditioning systems, e.g., through-wallunits, discard/eject the condensate water from the system to direct thecondensate water away from the air-conditioning system onto the groundor drain.

Discarding condensate water is a lost opportunity for increasing theenergy efficiency of an air-conditioning system. Instead of discardingthe condensate water, such water may be collected and stored in areservoir. This condensate water may be used during peak loadconditions, for example, during the conditions shown in Area I of FIG. 1. During such peak load conditions, the water may be sprayed underpressure onto a condenser coil to increase heat rejection and reduce theenergy required to provide cooling during peak load conditions.

FIG. 1 is an example graph of outdoor and indoor air temperature cyclesof an example day in an example location in accordance with someimplementations. This example graph of outdoor and indoor airtemperature cycles shows opportunities for energy savings by usingdifferent air intake paths based on indoor and outdoor temperatures at agiven point of time. The graph shown in FIG. 1 includes cross-overpoints where outdoor air temperature is then below indoor airtemperature (102) as well as where the outdoor air temperature is thenabove the indoor air temperature (104). Area I in FIG. 1 representsconditions where recirculating the indoor air is the mostenergy-efficient source of air for cooling by the air-conditioningsystem. Area II in FIG. 1 represents conditions where the outdoor air isthe most energy-efficient source of air for cooling by theair-conditioning system. This control logic thereby improves energysavings.

FIG. 2 shows a diagram of an exemplary air-conditioning system inaccordance with some implementations. More specifically, FIG. 2 showsthe components of an exemplary self-contained air conditioner withconfigurable air intake source for drawing indoor and outdoor air withthe goal of improving energy savings. This exemplary air-conditioningsystem is a through-wall unit that is positioned through an exteriorwall (202) separating the indoor space and the outdoor space, and thus,the indoor and the outdoor sources of air.

FIG. 2 also shows a ducting system within the air-conditioning system,which ducting system can be configured to draw either indoor air oroutdoor air through an evaporator (220). The intake source of air may beselected based on temperature of indoor and outdoor air. Temperature maybe measured, for example, using one or more temperature sensors.

FIG. 2 further shows interior air diverter valve (206) and exteriorintake valve (212). The control logic of an exemplary air-conditioningsystem may configure the positions of the interior air diverter valve(206) and the exterior intake valve (212) so as to draw the intake airfrom the more energy-efficient source. For example, during daytimehours, the control logic may recirculate indoor air using an interiorintake fan (204) and switch off the exterior intake fan (218) to keepout outdoor air. In this case, the interior air diverter valve (206)will be in Position A (208) to keep the indoor air within theair-conditioning system and the exterior intake valve (212) will be inPosition 2 (216) to keep the outdoor air out of the air-conditioningsystem.

Alternatively, during evening hours, when the temperature of the outdoorair falls below the temperature of the indoor air (102), the controllogic reconfigures the interior air diverter valve (206) to Position B(210) and uses the interior intake fan (204) to vent warmer indoor airoutside. In this situation, the control logic reconfigures the exteriorintake valve (212) to Position 1 (214) and also switches on the exteriorintake fan (218) to draw in the outdoor air.

However, when the temperature of the outdoor air rises above thetemperature of the indoor air (104), the control logic reconfigures theinterior air diverter valve (206) to Position A (208) and the exteriorintake valve (212) to Position 2 (216). In this situation, the controllogic also switches off the exterior intake fan (218) in order to keepthe outdoor air out of the system.

FIG. 3 shows an example evaporator condensate water collection, pumping,and spraying system in accordance with some implementations. FIG. 3shows condensation of water due to air passing through an evaporator(302), as the air cools and loses humidity, water condensates on theevaporator (302). This condensate water can be collected (308) andstored in a condensation water reservoir (310). The condensate waterstored can be used during peak load conditions shown in Area I of FIG. 1. During peak load conditions, a water pump (312) may be activated tospray water under pressure through a water spray nozzle (316) onto acondenser (304) to increase the heat rejection of the condenser (304)and reduce the energy required to cool the air within theair-conditioning system under such peak load conditions. FIG. 3 alsoshows an AC compressor (306) of an air-conditioning system and acondensation collector (308) to collect condensate water into thecondensation water reservoir (310).

FIG. 4 shows an example graph for determining spray timing logic inaccordance with some implementations. More specifically, FIG. 4 showshow to determine a time during a day or a night when a condensate waterspraying system should be activated. For example, such time may bedetermined through a spray logic (816) outlined in FIG. 8 (discussedbelow). The spray logic (816) may set/reset a clock based on theprevious day's “maximum daily outdoor temperature” (402) to predict atime in the future corresponding to “condenser water spray optimal use”(404), when/where energy savings may be improved the most or optimized.

FIG. 5 shows an example block diagram for intake source air ductingcontrol logic in accordance with some implementations. Morespecifically, FIG. 5 shows an example control logic block diagram fordetermining position of air diverter valves (206) and (212) andactivation of intake fans (204) and (218) based on readings from indoortemperature sensor, Tin (560) and outdoor temperature sensor, Tout (561)as recorded (520).

In some implementations, a user of an exemplary air-conditioning (AC)system may select (504) from one of four modes—a Normal Air-conditioningMode (512), an ECO Air-conditioning Mode (518), a Recirculate Air Mode(506), and a Fresh Air Mode (540).

In some implementations, in the Normal Air-conditioning Mode (512), theexemplary air-conditioning system will operate as a conventionalair-conditioning unit, where the air diverter valves (206) and (212) areconfigured in Position A (208) and Position 2 (216) respectively, i.e.,in Mode 2 (514). In this mode, the AC compressor (224) of the AC systemis switched on (516).

In some implementations, in the Recirculate Air Mode (506), the ductingis configured in Mode 2 (508) with the air diverter valves (206) and(212) configured in Position A (208) and Position 2 (216) respectively.In this mode, the compressor (224) of the AC system is switched off(510) and the indoor air is recirculated using the interior intake fan(204), which is switched on. Also, in this mode, the exterior intake fan(218) is switched off to keep the outdoor air out.

In some implementations, in the Fresh Air Mode (540), the ducting isconfigured in Mode 1 (542), with the air diverter valves (206) and (212)configured in Position B (210) and Position 1 (214) respectively. Inthis mode, the compressor (224) of the AC system is switched off (544).Also, the interior intake fan (204) is switched on to vent out theindoor air (to the outside) and the exterior intake fan (218) isswitched on to draw in the fresh exterior air (from the outside).

In some implementations, in the ECO Air-Conditioning Mode (518), thecontrol logic is enabled to dynamically select the most energy-efficientmethod and configuration to cool the air based on changes inenvironmental conditions. This mode configures the positions of the airdiverter valves (206) and (212) automatically, without a user'sintervention, and determines the most energy-efficient configurationusing recorded sensor data (520).

In some implementations of the ECO Air-Conditioning Mode (518), in thefirst logic processing loop, when a loop counter equals 0 or zero (522),the control logic will proceed to determine whether the outdoortemperature “Tout” (561) is greater than the indoor temperature “Tin”(560) during its process (524). If “Tout” (561) is less than “Tin”(560), a result of “NO” configures the ducting to Mode 1 (526), turnsthe compressor (224) of the AC system on (528), and adds 1 to the loopcounter (530). If “Tout” (561) is greater than “Tin” (560), a result of“YES” configures the ducting to Mode 2 (532), turns the compressor (224)of the AC system on (534), and adds 1 to the loop counter (536).

In some implementations of the ECO Air-Conditioning Mode (518),loopcount (522) may not equal 0 and a determination of “NO” may occur ifit is not the first loop in the logic processing. The purpose of thisbranch is to include hysteresis in the control logic to avoid excessivechanging between Mode 1 and Mode 2, when “Tout” (561) fluctuates withina range of “Tin” (560), where the range is determined by the hysteresisvalue. In some implementations, if the answer to whether Mode=1 (538) inthis branch is “YES”, a determination of whether “Tout” (561)>“Tin”(560)+hysteresis value (548) is made. If the result of thisdetermination is “YES”, then the ducting is configured to Mode 2 (550)and the compressor (224) of the AC system is turned on (552). If thedetermination of whether “Tout” (561)>“Tin” (560) +hysteresis value(548) results in “NO”, then the branch terminates at “END” (558) and anew loop commences at “START” (502).

On the other hand, in some implementations, if the first component ofthis branch determines that the answer to whether Mode=1 (538) is “NO”,a determination of whether “Tout” (561)<“Tin” (560)—hysteresis value(546) is made. If the result of this determination is “YES”, then theducting is configured to Mode 1 (554) and the compressor (224) of the ACsystem is turned on (556). If the determination of whether “Tout”(561)<“Tin” (560)—hysteresis value (546) results in “NO”, then thebranch terminates at “END” (558) and a new loop begins at “START” (502).

FIG. 6 shows the configuration of Mode 1, where the interior airdiverter valve is in Position B (open intake flap), the interior intakefan is on, the exterior intake valve is in Position 1, and the exteriorintake fan is on. FIG. 7 shows the configuration of Mode 2, where theinterior air diverter valve is in Position A (close intake flap) and theinterior intake fan is on, and where the exterior intake valve is inPosition 2 and the exterior intake fan is off.

FIG. 8 is an example block diagram of spray control logic in accordancewith some implementations. More specifically, the logic block diagramshown in FIG. 8 determines whether and when to activate the watercondensate spray system. For example, the control logic in FIG. 8determines when to spray water safely and optimally. Beginning at“START” (802), the spray control logic proceeds to record the current“Tout” (561) and “Tcondenser” (562) values (812), where “Tcondenser”(562) refers to the temperature of a condenser (304). The spray controllogic then proceeds to store a series of “Tout” (561) values over timeto determine “Tout Max”, the maximum temperature that was achievedduring a day and a time when that maximum temperature was achieved(814). The spray control logic then re/sets a specified clock valuebased on the time when the maximum temperature was reached (814).

The spray control logic then proceeds to determine whether the sprayfeature is enabled or not (804). If the feature is not enabled, leadingto a “NO” result, the control logic will proceed to “END” (818). If thespray feature is found to be enabled, leading to a “YES” result, thespray control logic proceeds to undertake a systems and function check(806) to look/search for errors before activating the spraying of water.For example, outdoor sensor limits, condenser temperature (562), waterpump (312) resistance and condensation water reservoir (310) sensors arechecked in this systems and function check (806). If any errors arefound, the errors are recorded (808) and the control logic proceeds to“END” (818). If no errors are found, then the spray control logicproceeds to determine whether the outdoor temperature, “Tout” (561), isbelow a minimum ambient temperature, “Tamb Min”, to safely pump water(810). In some implementations, this check is performed to ensure thatthe sprayed water does not freeze if freezing conditions prevail. If theoutdoor temperature, “Tout” (561), is below a minimum ambienttemperature, “Tamb Min”, leading to a “YES” result, the control logicwill proceed to “END” (818) and terminate.

The stored clock reset value (814) is then used by the spray controllogic (816) to determine the most beneficial time to spray water on acondenser (304) so as to improve, maximize, or optimize the disclosedair-conditioning system's energy efficiency and/or savings. The spraylogic system's output (816) determines the most beneficial time during aday or a night to safely activate the system and spray water (316) on acondenser (304). This output is based on whether the spray feature isenabled or not, the condenser temperature, “Tcondenser” (562), the clocksetting based on a time corresponding to the maximum temperature reachedduring a day as shown in FIG. 4 , the level of water in the condensatewater reservoir (310), a time corresponding to the last activation ofthe spray pump, and any errors stored during the systems and functioncheck (808). All these inputs are used to determine whether and when toactivate a water pump (312) to spray water on a condenser (304) via awater spray nozzle (316).

In some implementations, the optimal time at which the water spraysystem must be activated (316) is determined through a spray controllogic process outlined in FIG. 8 above. In some implementations, thespray logic system (816) may reset/set a clock based on a previous day'shighest outdoor temperature (402) to determine a time when a likelymaximum energy saving may occur in the future (404). Exceptions to thecontrol logic may occur if a systems and function check (806) revealsthat one or more errors, e.g., hardware issues, are active (808), if theoutdoor temperature is below a pre-determined minimum ambienttemperature (810), e.g., if outdoor freezing conditions may freeze thewater sprayed, or if condensation water reservoir (310) is near fullcapacity and water needs to be sprayed to avoid water overflow.

In some implementations, during peak daytime hours, indoor air isrecirculated by turning on an interior intake fan (204), configuringinterior air diverter valve (206) in Position A (208) and exteriorintake valve (212) in Position 2 (216), and turning off an exteriorintake fan (218). In some implementations, during evening hours, whenthe outdoor air temperature falls below the indoor air temperature(102), interior air diverter valve (206) is configured in Position B(210) to vent warm indoor air to the outside. In this scenario, exteriorintake valve (212) is configured in Position 1 (214), and the exteriorintake fan (218) is turned on to draw in cool outdoor air via theevaporator (220). In some implementations, once the outdoor airtemperature rises above the indoor air temperature (104), interior airdiverter valve (206) is configured in Position A (208) and exteriorintake valve (212) in Position 2 (216), and the exterior intake fan(218) is turned off. In this case, the interior intake fan (204) isswitched on to draw indoor air via the evaporator (220).

In some implementations, the control logic for determining whether todraw air into an air-conditioning system from an indoor air source or anoutdoor air source is based on user selection or options selected by auser. In some implementations, whether and when to spray condensatewater on a condenser (304) is based on user selection or optionsselected by a user.

In some implementations, the control logic determines the duration forwhich water may be sprayed on a condenser (304) from the condensationwater reservoir (310). In other implementations, a user may determinethe duration for which such water may be sprayed.

FIG. 9 shows an example configuration (900) having a single motor (902)and a single moveable airflow control plate (904) in accordance withsome implementations. The single motor (902) controls both an interiorairflow fan and an exterior airflow fan. The moveable airflow controlplate (904) is moveable between a first position and second position forMode 1 and Mode 2 operation, respectively. The moveable airflow controlplate (904) can also be set to intermediate positions having a mix ofinterior and exterior air intake.

FIGS. 10A and 10B show details of Mode 1 and Mode 2 settings of thesingle moveable plate in accordance with some implementations. FIG. 10Ashows details of Mode 1 where the moveable airflow control plate is in afirst position that permits exterior air to be drawn in. FIG. 10B showsdetails of Mode 2 where the airflow control plate is move to a secondposition that blocks exterior air and permits interior air to flow.

It will also be appreciated that the interior intake fans, interior airdiverter valves, exterior intake fans, exterior intake valves,condensation collectors, condensation water reservoirs, water pumps,water spray nozzles, condensers, evaporators, compressors, intake flaps,temperature sensors, control logic, air-conditioners, andair-conditioning systems described herein are for illustration purposesonly and not intended to be limiting. Other types of interior intakefans, interior air diverter valves, exterior intake fans, exteriorintake valves, condensation collectors, condensation water reservoirs,water pumps, water spray nozzles, condensers, evaporators, compressors,intake flaps, temperature sensors, control logic, air-conditioners, andair-conditioning systems may or can be used depending on a contemplatedimplementation.

It is therefore apparent that there is provided, in accordance with thevarious example implementations disclosed herein, methods and systemsrelating to dual-source air intake air-conditioners and methods andsystems for using condensate water to boost energy efficiency.

While some example implementations have been described in terms of ageneral embodiment with several specific example modifications, it isrecognized that other modifications, implementations, and variations ofthe embodiments described above are within the spirit and scope of thedisclosed subject matter. Applicant intends to embrace any and all suchmodifications, variations, embodiments, and implementations in thisapplication.

What is claimed is:
 1. An air-conditioning system comprising: aconfigurable internal ducting system, wherein the configurable internalducting system can be configured to draw air from at least one of anindoor source or an outdoor source; and a control logic to determinewhether the air is to be drawn from the indoor source or the outdoorsource.
 2. The air-conditioning system of claim 1, wherein the controllogic is configured to reduce energy consumption of the air-conditioningsystem.
 3. The air-conditioning system of claim 1, wherein the controllogic causes the air to be drawn from the indoor source when indoor airfrom the indoor source is cooler than outdoor air from the outdoorsource.
 4. The air-conditioning system of claim 1, wherein the controllogic causes the air to be drawn from the outdoor source when outdoorair from the outdoor source is cooler than indoor air from the indoorsource.
 5. The air-conditioning system of claim 1, further comprising:an evaporator, wherein the air is drawn from at least one of the indoorsource or the outdoor source through the evaporator.
 6. Theair-conditioning system of claim 1, further comprising: an interiorintake fan, wherein the air from the indoor source is recirculatedthrough the interior intake fan; and an exterior intake fan, wherein theair from the outdoor source is circulated through the exterior intakefan.
 7. The air-conditioning system of claim 1, further comprising: aninterior intake fan, wherein the air from the indoor source is ventedout through the interior intake fan.
 8. The air-conditioning system ofclaim 1, further comprising: a single motor to operate an interior fanand an exterior fan, wherein the configurable internal ducting systemincludes a single moveable plate that controls an intake air source andis moveable to select an interior air source or an exterior air source.9. An air-conditioning system comprising: an evaporator condensatereservoir to store condensate water collected from one or moreevaporator coils of the air-conditioning system; an evaporatorcondensate pump to spray the stored condensate water on one or morecondenser coils of the air-conditioning system; and a control logicconfigured to control the air-conditioning system.
 10. Theair-conditioning system of claim 9, wherein the control logic determineswhether the evaporator condensate reservoir is full.
 11. Theair-conditioning system of claim 9, wherein the control logic determinesa time during which the evaporator condensate pump should be inoperation.
 12. The air-conditioning system of claim 9, wherein thecontrol logic determines a duration for which the evaporator condensatepump should be in operation.
 13. The air-conditioning system of claim 9,further comprising: a configurable internal ducting system, wherein theconfigurable internal ducting system can be configured to draw air fromat least one of an indoor source or an outdoor source; and anevaporator, wherein the air is drawn from at least one of the indoorsource or the outdoor source via the configurable internal ductingsystem through the evaporator, wherein the control logic is furtherconfigured to determine whether the air is to be drawn from the indoorsource or the outdoor source.
 14. The air-conditioning system of claim13, wherein the control logic determines whether a temperature of theair from the outdoor source is below a predetermined threshold.
 15. Theair-conditioning system of claim 13, further comprising: an interiorintake fan, wherein the air from the indoor source is recirculatedthrough the interior intake fan.
 16. The air-conditioning system ofclaim 13, further comprising: an interior intake fan, wherein the airfrom the indoor source is vented out through the interior intake fan.17. The air-conditioning system of claim 13, further comprising: anexterior intake fan, wherein the air from the outdoor source iscirculated through the exterior intake fan.
 18. The air-conditioningsystem of claim 13, wherein the control logic causes the air to be drawnfrom the indoor source when indoor air from the indoor source is coolerthan outdoor air from the outdoor source.
 19. The air-conditioningsystem of claim 9, wherein the control logic causes the air to be drawnfrom an outdoor source when outdoor air from the outdoor source iscooler than indoor air from an indoor source.
 20. An air-conditioningsystem comprising: a configurable internal ducting system, wherein theconfigurable internal ducting system can be configured to draw air fromat least one of an indoor source or an outdoor source; an evaporatorcondensate reservoir to store condensate water collected from one ormore evaporator coils of the air-conditioning system; an evaporatorcondensate pump to spray the stored condensate water on one or morecondenser coils of the air-conditioning system; and a control logic todetermine, based on a selection of a user, whether the air is to bedrawn from the indoor source or the outdoor source.